Mysterious algae

[Michael v]

I was looking at my sand bed and noticed two black spots. Also noticed some more on the other end. Might be nothing. I sucked what I could with a turkey baster any thoughts?

 

[Idoc]

How old is the tank? Cyano can come in a black form. Possibly that since it sucked up so easily with a Turkey baster.

 

[ScottR]

I was looking at my sand bed and noticed two black spots. Also noticed some more on the other end. Might be nothing. I sucked what I could with a turkey baster any thoughts?

Pics and age of tank? Lots of weird things come and go as your tank progresses.

 

[Michael v]

My tank is about one year old. You my be right. I removed one of my rocks completely because it had cyno on it.

 

[Michael v]